Air valve for compressors and the like



rlocated behind one another in the direction of iiow (see arrow I) of the air. The bending point the laminae vibrate about their clampingpoints at 1. 'I'he clamping points 1 and the'packing point I of the laminae against the bars I are 1 oi' the piece of sheet metal has a comparatively small radius of curvature.

Where the air stream meets the barsV I they have acomparativelysmall radius of curvature. The laminae 8 together with the lateral wall of the bar form a nozzle shaped passage. As soon as the laminae 8 are opened the passage acts as a diiiuser. 'I'he free edge 9 of the lamina bears against about the narrowest point oi' this passage.

The side edges oi' each lamina extend, with as eifective a packing action as possible, against the end wall of the carrier 6. In this-manner the airis prevented practically completelyfromnow-- ing around these edges. Y the holding body 2 terminate at the top -in sharp edges. l'I'he lateral walls of these parts Vand also the laminae serve for effectively guiding the air. The air flows through the valve without any. substantial deviation from its direction of ilow and without any appreciable loss in pressure.

As shown in Fig. 5 the canier l may be constructed as a ring. The valve arrangement is particularly suitable for compressors having a high speed. e

The pressure conditions are shown in Fig. l. The diagram in Fig. l shows the pressure variations of the air stream ilowing through the valve. The air ows into the valve at a pressure p1. This pressure decreases at the narrowest throughnow at f2 to p2=p1Apa- 'I'he pressure pz=p1Apz again increases at fa to p3. The abbreviationata in the drawings (see Fig. 1A) .means atmospheres absolute, or absolute atmospheric pressure.

What I wishto claim and secure by U. S. Letters Patent is: I f f l. A valve for compressors for a compressible medium comprising laminae extending in .the.di V rection oi' flow of the mediumand consisting of a resilient material, holders oi' pear-shaped cross section for the said laminae, bars of pear-shaped cross section extending parallel to the said holders l and cooperating with the laminae, each twolaminae consisting oi' a single piece of sheet metal o! U- shaped cross section which embraces the said holder and of which each of the two ends bears resiliently and with a packing action against a separate bar, the ends of the said holders and the said bars located on the outiiow side of the valve being located at the same distance from the inlet of the structure.

2; A valve for compressors for a compressible medium comprising laminae extending in the direction of ilow of the medium and consisting oi' a resilient material, holders of pear-shaped cross section for the said laminae, bars of pear-shaped cross-section extending parallel to the said hold- Both the `bars i and ers and cooperating with the laminae, each two laminae consisting of a single piece of sheet metal of U-shapedv cross section which embraces the said holder and of which each of the two ends bears resiliently and with a packing action against a separate bar, the ends of the said holders and the said bars located on the outow side of the valve being located at the same distance from the inlet of the' structure, a valve body bearing the holders and clamping screws to press the holdersr and the sheet metal of U-shaped cross section to said valve body.

3. A valve for compressors for a compressible medium comprising laminae extending in the direction of iiow of the medium and consisting of a resilient material, holders of pear-shaped cross section for the said laminae, bars of pear-shaped cross-section extending parallel to the said holders and cooperating with the laminae, each two laminae consisting vof a single piece of sheet metal oi' U-shaped cross section which embraces the said holder and of which each of the two ends bears resiliently and with a packing action against a separate bar, the ends of the said holders and the said Abars located on the outflowside of the valve being located at the same distance from the inlet of the structure, a valve body bearing the holders and clamping screws to press the holders and the sheet metal of U-shaped cross section to said valve body, the said clamping screws being screwed through the side walls of the valve body.

4. In a ilap valve structure, a set of parallelly disposed bars tapered in cross section to provide straightway fluid passages between them, the narrowest portions of saidpassages being adjacent the widest portions of said bars, means rigidly holding said bars in spaced relation, resilient laminae anchored at their inner ends and having their outer ends constructed to lie'substantially Yat the narrowest portions of said passages, said laminae being designed to conform vto the bars, there being onelamina used per passage.

5. A ap valve structure including a pair oi.' parallelly disposed bars of an outwardly tapered cross section to provide a `nozzle-shaped passage, means tohold said bars rigidly in spaced relation and to provide iluid passages for communication with the nozzle-shaped passage, resilient laminae, means to hold said laminae rigidly along their inner ends and having their outer free end s arranged to lie at approximately the narrowest portion of said nozzle-shaped passage, said laminae being constructed to close said nozzle-shaped passage when back pressure occurs therein and to open said nozzle-shaped passage when the positive pressure acting on the seating faces of said laminae is'suificientto overcome the resiliency of said laminae, there being one lamina used per fluid passage.

GUSTAV EICHELBERG. 

